package com.tepth.busfix.tools;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;

import java.util.Stack;

/**
 * Created by smacr on 2016/10/20.
 */
public class ActivityTaskManager {

    private Stack<Activity> activityStack = new Stack<>();

    private static ActivityTaskManager instance;

    private ActivityTaskManager() {
    }

    /**
     * 单一实例
     */
    public static synchronized ActivityTaskManager getActivityTaskManager() {
        if (instance == null) {
            instance = new ActivityTaskManager();
        }
        return instance;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            return;
        }
        if (activityStack == null) {
            activityStack = new Stack<Activity>();
        }
        activityStack.add(activity);
    }


    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        if (activityStack == null) {
            return;
        }
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        try {
            if (activityStack == null) {
                return;
            }
            if (activity != null) {
                activityStack.remove(activity);
                activity.finish();
                activity = null;
            }
        }catch (Exception e){
            e.printStackTrace();
        }

    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        try {

            if (activityStack == null) {
                return;
            }
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    finishActivity(activity);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        if (activityStack == null) {
            return;
        }
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            if (null != activityStack.get(i)) {
                activityStack.get(i).finish();
            }
        }
        activityStack.clear();
    }


    /**
     * 退出应用程序
     */
    @SuppressWarnings("deprecation")
    public void appExit(Context context) {
        try {
            finishAllActivity();
            ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            activityManager.restartPackage(context.getPackageName());
            System.exit(0);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}
